基于热压缩试验与模拟的Incoloy028合金挤压工艺参数优化（英文）

发布时间：2018-06-23 00:13

本文选题：Incoloy合金 + 热挤压　；参考：《Transactions of Nonferrous Metals Society of China》2017年11期

【摘要】：采用热压缩实验方法研究Incoloy028合金在高温和高应变速率下应力-应变曲线。应力-应变曲线表明,峰值应力随着温度的升高和应变速率的下降而降低。采用有限元模拟方法研究挤压过程中温度、挤压速度和摩擦因数对挤压载荷、应力、应变和应变速率的影响,提高挤压温度可以降低挤压载荷和变形抗力,但对应变和应变速率的影响较小。当挤压速度在200~350 mm/s之间变化时,挤压载荷没有发生明显变化;当挤压速度达到400 mm/s时,挤压突破力达到42500 k N,挤压过程极不稳定。随着挤压速度的增大,应力和应变速率增大。当摩擦因数在0.02~0.03之间变化时,变形抗力约为160 MPa,挤压过程中应变速率可以控制在70 s~(-1)以下。生产试验成功验证了采用有限元方法优化后的挤压工艺参数,产品的力学实验结果满足性能要求。
[Abstract]:The stress-strain curves of incoloy 028 alloy at high temperature and high strain rate were studied by hot compression method. The stress-strain curve shows that the peak stress decreases with the increase of temperature and the decrease of strain rate. The effects of temperature, extrusion speed and friction factor on extrusion load, stress, strain and strain rate during extrusion are studied by finite element simulation method. Increasing extrusion temperature can reduce extrusion load and deformation resistance. But the effect on strain and strain rate is small. When the extrusion speed varies from 200 to 350 mm/s, the extrusion load does not change obviously, and when the extrusion speed reaches 400 mm/s, the extrusion breakthrough force reaches 42500 KN, and the extrusion process is extremely unstable. With the increase of extrusion speed, the stress and strain rate increase. When the friction coefficient varies from 0.02 to 0.03, the deformation resistance is about 160 MPA, and the strain rate can be controlled below 70 s ~ (-1) during extrusion. The process parameters optimized by finite element method (FEM) were successfully verified and the mechanical test results of the products met the performance requirements.
【作者单位】：西安交通大学金属材料强度国家重点实验室;太原钢铁(集团)有限公司不锈钢管公司;
【基金】：Project(50925417)supported by the National Science Fund for Distinguished Young Scholars of China
【分类号】：TG376

【相似文献】